Stereoselective synthesis of trans-olefins by the copper-mediated SN 2′ reaction of vinyl oxazines with Grignard reagents. Asymmetric synthesis of d-threo- …
... Tetrahedron Letters. Volume 48, Issue 13, 26 March 2007, Pages 2345–2348. ... In this Letter, we report the novel S N 2′ reaction of vinyl oxazines I with Grignard reagents in the presence of CuCN, which proceeds with high trans selectivity for double bond formation. ...